It's an internal organ.

The sea snail is slow-moving and often feeds on seaweed and tiny organisms, and they generally inhabit shallow waters and feed on echinoderms. The outer lip of the shell is extremely outspread and the female snails are significantly larger than the males. The meat is edible and the shell is ornamental and can be used for carving. Nocturnal. Feet are located on the ventral side of the body, are blocky and extremely muscular, suitable for crawling.

Carnivorous. Feeds mainly on echinoderms and other animals. These molluscan members usually live in shallow water or flat mud, and are seen in deep water up to 600 feet (200 meters) deep. Most conch are caught in trap boxes or trawls, and they can also be incidental catch for other products.

Expanded information;

In the culture of conch for the breeding environment control is also need to carry out reasonable control, conch culture is not with other types of shellfish in the culture together, away from the same type of shellfish, so can effectively avoid the phenomenon of nutritional competition between them to fight.

The number of conch culture mainly depends on the investment of conch culture capital and corresponding culture technology, and then the number of conch culture to determine the area of conch culture. In order to prevent the snails from escaping during the growing process or other kinds of shellfish from entering by mistake, it is necessary to use barbed wire to surround the farm and make sure that it is absolutely solid.

And in order to prevent the sea snail in the sea of oxygen deficiency, so need to be inserted in the breeding area of the length of thick and thin small bamboo poles, so that the snail can climb to the bamboo poles in time to breathe in the oxygen deficiency state.

Source: Baidu Encyclopedia - Conchs